Sheriff, A. (1990). Slaves, spices and ivory in Zanzibar. Tanzania publ..
Lua i Stíl Chicago (17ú heag.)Sheriff, Abdul. Slaves, Spices and Ivory in Zanzibar. Tanzania: Tanzania publ., 1990.
Lua MLA (9ú heag.)Sheriff, Abdul. Slaves, Spices and Ivory in Zanzibar. Tanzania publ., 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.